与 Nrf UART 的蓝牙配对工作不正常

Question

蓝牙配对工作不正常。我正在开发基于蓝牙与 UART 配对的应用程序。在这里，我包含了我的概念，Program.Help 我会解决这个问题。

我的预期结果是如果用户按下“连接”按钮。它应该在没有用户输入和配对请求和 PIN 的确认屏幕的情况下配对。最后设备响应连接。

我的实际结果是确认屏幕和用户输入弹出窗口将打开。之后设备配对。最后，设备没有回复我已连接。

我被那个问题困住了超过 2 天。帮我解决这个问题。

1.在 onstart() 方法中注册 PAIRING

          IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_PAIRING_REQUEST);
         this.registerReceiver(mPairingRequestReceiver, filter);

2。 BroadcastReceiver 用于接收配对请求。

  private BroadcastReceiver mPairingRequestReceiver = new BroadcastReceiver() {
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (action.equals(BluetoothDevice.ACTION_PAIRING_REQUEST)) {
            try {
                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                int pin = intent.getIntExtra("android.bluetooth.device.extra.PAIRING_KEY", 123456);
                //the pin in case you need to accept for an specific pin
                byte[] pinBytes;
                pinBytes = ("" + pin).getBytes("UTF-8");
                device.setPin(pinBytes);


        } catch (Exception e) {
                Log.e(TAG, "Error occurs when trying to auto pair");
                e.printStackTrace();
            }
        }
    }
};

/* 连接设备后我正在创建债券*/

     @Override
     public void onDeviceConnected(BluetoothDevice device) {

        device.createBond();

      }

Answer 1

您可以绕过本机蓝牙配对过程并以编程方式与蓝牙外围设备配对。试试这个：

为 BluetoothDevice.ACTION_PAIRING_REQUEST 注册具有最高优先级的接收器。

private void notPaired(){
    IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_PAIRING_REQUEST);
    filter.setPriority(SYSTEM_HIGH_PRIORITY-1);
    registerReceiver(mReceiver, filter);
    mDevice.createBound();// OR establish connection with the device and read characteristic for triggering the pairing process 
    getBoundState();
}

private final BroadcastReceiver mReceiver = new BroadcastReceiver()
{
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if(BluetoothDevice.ACTION_PAIRING_REQUEST.equals(action)){
            final BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            int type = intent.getIntExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT, BluetoothDevice.ERROR);

            if(type == BluetoothDevice.PAIRING_VARIANT_PIN){
                byte[] pin = "123456".getBytes();
                device.setPin(pin);
                Log.i("Pairing Process ", "Pairing Key Entered");
                abortBroadcast();
            }else
                Log.i("Pairing Process: ", "Unexected Pairing type");
        }
    }
};

为确保设备已配对，请为 BluetoothDevice.ACTION_BOND_STATE_CHANGED

注册接收器

private void getBoundState(){
    IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
    registerReceiver(boundStateReciver, filter);
}

private final BroadcastReceiver boundStateReciver= new BroadcastReceiver()
{
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)) {
            final int d = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE,-1);
            switch(d){
                case BluetoothDevice.BOND_BONDED:
                    Log.i("Pairing Process ", "Paired successfully");
                break;
            }
        }
    }
};

在清单中添加 this 权限

<uses-permission android:name="android.permission.BLUETOOTH_PRIVILEGED" />

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